The houses are made for two brother that living close to each other. “Sharing” environment is the key design of these houses. Therefore, negative spaces are created from the positive form by using tectonic of wall, ceiling, floor and also fence to define a room not only indoor but outdoor as well. As a result, a blurred line are rendered between interior and exterior and also space in between houses, which is a public zone. In order to preserve privacy of each family, “shell” is made to screen the visual permeability from each other. Moreover, the design provide spaces for living together in harmony with nature.